使用 Retrofit 解析动态键 Json 字符串

Question

我正在尝试解析以下动态键 Json 字符串。

"report":{
    "data":{
        "results":{
            "558952cca6d73d7d81c2eb9d":{
                "Max":-1,
                "Min":-1,
                "Slope":-1,
            },

            "558ce148a6d73d7d81c2fa8a":{
                "Max":-2,
                "Min":-1,
                "Slope":-2,
            }
        }
    }
}

下面我正在尝试获取数据，但在解析最后一个动态 json 字符串时出错。

 public class Report {
        @SerializedName("data")
        @Expose
        private Data data;

        public Data getData() {
            return data;
        }

        public void setData(Data data) {
            this.data = data;
        }

        @Override
        public String toString() {
            return "Report{" +
                    "data=" + data +
                    '}';
        }
    }

    public class Data {
        @SerializedName("results")
        @Expose
        private ResultInside result;

        public ResultInside getResult() {
            return result;
        }

        public void setResult(ResultInside result) {
            this.result = result;
        }
    }

    public class ResultInside {
        /*@SerializedName("results")
        @Expose*/
        private Map<String, Vitals> elemDetails = new HashMap<>();

        public Map<String, Vitals> getElemDetails() {
            return elemDetails;
        }

        public void setElemDetails(Map<String, Vitals> elemDetails) {
            this.elemDetails = elemDetails;
        }
    }

在这种情况下如何解析的任何建议！

Answer 1

您的 resultInside class 正在添加您的 JSON 中不存在的额外对象层。尝试将地图移动到您的 Data class results 字段。

public class Data {
    @SerializedName("results")
    @Expose
    private Map<String, Vitals> result;

    //....
}

Answer 2

更好的方法是：

----------------------

public class Report {
        @SerializedName("data")
        @Expose
        private Data data;

----------------------

public class Data {


    public HashMap<String, DataValues> dataValues;


    public Data() {
        this.dataVaues = new HashMap<>();
    }
}

-----------------------------

然后，像这样创建一个解析器 class：

public class DataParser implements JsonDeserializer<Data> {


    @Override
    public Data deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {

        Data result = new Data();


        try {
            final HashMap<String, DataValues> map = readServiceUrlMap(json.getAsJsonObject());

            if(map != null) {
                result.dataValues = map;
            }

        }catch (JsonSyntaxException ex){
            return null;
        }

        return result;
    }


    private HashMap<String, DataValues> readServiceUrlMap(final JsonObject jsonObject) throws JsonSyntaxException {

        if(jsonObject == null) {
            return null;
        }
        Gson gson = new Gson();

        HashMap<String, DataValues> products = new HashMap<>();

        for (Map.Entry<String, JsonElement> entry : jsonObject.entrySet()) {

            String key = entry.getKey();
            DataValues value = gson.fromJson(entry.getValue(), DataValues.class);
            products.put(key, value);
        }
        return products;
    }


----------------------------------------------

之后，在您的 ApiClient 中输入此内容 class

public class ApiClient {


    private static Retrofit retrofit = null;

    public static Retrofit getClient(String baseUrl) {

        if(retrofit == null) {

            GsonBuilder gsonBuilder = new GsonBuilder();
            gsonBuilder.registerTypeAdapter(Data.class, new DataParser());

            retrofit = new Retrofit.Builder()
                    .baseUrl(baseUrl)
                    .addConverterFactory(GsonConverterFactory.create(gsonBuilder.create()))
                    .build();

我希望这会对某人有所帮助

使用 Retrofit 解析动态键 Json 字符串

Parse Dynamic Key Json String using Retrofit

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